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<head>
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  <title>学生</title>
  <link rel="stylesheet" href="./bootstrap/bootstrap.min.css" />
  <link rel="stylesheet" href="./bootstrap/bootstrap-icons.css" />
  <link rel="stylesheet" href="./css/common.css" />
  <style>
    .text {
      font-size: 12px;
      margin: 0;
      padding: 5px 20px;
      color: #999;
    }

    .card i:hover {
      cursor: pointer;
    }

    .bt-1 {
      margin-top: 4px;
    }

    .card-fluid {
      border: none;
      padding: 15px;
    }

    .card .table th {
      border-color: transparent;
    }

    .form-group {
      display: flex;
      align-items: center;
      height: calc(1.5em + 1.5rem + 2px);
    }

    .form-group>label {
      width: 100px;
      text-align: right;
      padding-right: 10px;
      margin-bottom: 0;
    }

    .form-group>input {
      flex: 1;
    }

    .form-group .input {
      flex: 1;
      padding-left: 10px;
      display: flex;
    }

    .form-group .form-check {
      margin-bottom: 0;
      margin-right: 30px;
    }

    .form-group .input select {
      width: 140px;
      margin-right: 20px;
    }

    .custom-select {
      background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23999999' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M2 5l6 6 6-6'/%3e%3c/svg%3e");
      background-size: 12px 12px;
    }
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<body class="application application-offset">
  <div class="container-fluid container-application">
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          <div class="mt-5">
            <h5 class="mb-0 text-white">黑马前端</h5>
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          <span class="btn-inner--icon d-block pt-2">学生</span>
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          <span class="btn-inner--icon d-block"><i class="bi bi-gear bi-2x"></i></span>
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        <div class="card-body">
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        <div class="container-fluid">
          <!-- Navbar nav -->
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            <!-- Right menu -->
            <ul class="navbar-nav ml-lg-auto align-items-center d-none d-lg-flex">
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                <a class="nav-link pr-lg-0" href=".dropdown-menu" role="button" data-toggle="dropdown"
                  aria-haspopup="true" aria-expanded="false">
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                      <span class="mb-0 text-sm font-weight-bold username">Admin</span>
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      <div class="page-content">
        <div class="page-title mb-3">
          <div class="row justify-content-between align-items-center">
            <div class="col-md-6 mb-3 mb-md-0">
              <h5 class="h3 font-weight-400 mb-0 text-white">Students</h5>
              <span class="text-sm text-white opacity-8">一共有 <b class="total">0</b> 位学员</span>
            </div>
            <div class="col-md-6 d-flex align-items-center justify-content-between justify-content-md-end">
              <a id="openModal" href="javascript:;" class="btn btn-sm btn-white btn-icon-only rounded-circle ml-4">
                <span class="btn-inner--icon"><i class="bi bi-plus bi-2x"></i></span>
              </a>
            </div>
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        <div class="row">
          <div class="col">
            <div class="card card-fluid">
              <div class="table-responsive" style="min-height: 1000px">
                <table class="table align-items-center">
                  <thead>
                    <tr>
                      <th>姓名</th>
                      <th>年龄</th>
                      <th>性别</th>
                      <th>组号</th>
                      <th>期望薪资</th>
                      <th>就业薪资</th>
                      <th>籍贯</th>
                      <th>操作</th>
                    </tr>
                  </thead>
                  <tbody class="list">
                    <!-- <tr>
                      <td>张杰</td>
                      <td>20</td>
                      <td>男</td>
                      <td>第2组</td>
                      <td>10000</td>
                      <td>13000</td>
                      <td>北京北京市东城区</td>
                      <td>
                        <a href="javascript:;" class="text-success mr-3"><i class="bi bi-pen"></i></a>
                        <a href="javascript:;" class="text-danger"><i class="bi bi-trash"></i></a>
                      </td>
                    </tr> -->
                  </tbody>
                </table>
              </div>
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                All rights reserved.</p>
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              <ul class="nav justify-content-center justify-content-md-end">
                <li class="nav-item">
                  <a class="nav-link" href="#">Support</a>
                </li>
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                  <a class="nav-link" href="#">Terms</a>
                </li>
                <li class="nav-item">
                  <a class="nav-link pr-0" href="#">Privacy</a>
                </li>
              </ul>
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      </div>
    </div>
  </div>
  <!-- add Modal -->
  <div class="modal fade" id="modal">
    <div class="modal-dialog modal-lg">
      <div class="modal-content">
        <div class="modal-header">
          <h5 class="modal-title">添加学员</h5>
          <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
        </div>
        <div class="modal-body">
          <form id="form" class="g-3 row" autocomplete="off" novalidate>
            <div class="col-sm-6">
              <div class="form-group">
                <label class="input-group-label">姓名：</label>
                <input type="text" name="name" class="form-control" placeholder="请输入姓名" />
              </div>
            </div>
            <div class="col-sm-6">
              <div class="form-group">
                <label class="input-group-label">性别：</label>
                <div class="input">
                  <div class="form-check d-inline-block">
                    <input value="0" checked id="cb01" class="form-check-input" type="radio" name="gender" />
                    <label for="cb01" class="form-check-label">男</label>
                  </div>
                  <div class="form-check d-inline-block">
                    <input value="1" id="cb02" class="form-check-input" type="radio" name="gender" />
                    <label for="cb02" class="form-check-label">女</label>
                  </div>
                </div>
              </div>
            </div>
            <div class="col-sm-6">
              <div class="form-group">
                <label class="input-group-label">年龄：</label>
                <input type="text" name="age" class="form-control" placeholder="请输入年龄" />
              </div>
            </div>
            <div class="col-sm-6">
              <div class="form-group">
                <label class="input-group-label">组号：</label>
                <input type="text" name="group" class="form-control" placeholder="请输入1-8组号" />
              </div>
            </div>
            <div class="col-sm-6">
              <div class="form-group">
                <label class="input-group-label">期望薪资：</label>
                <input type="text" name="hope_salary" class="form-control" placeholder="请输入期望薪资" />
              </div>
            </div>
            <div class="col-sm-6">
              <div class="form-group">
                <label class="input-group-label">就业薪资：</label>
                <input type="text" name="salary" class="form-control" placeholder="请输入就业薪资" />
              </div>
            </div>
            <div class="col-sm-12">
              <div class="form-group">
                <label class="input-group-label">籍贯：</label>
                <div class="input pl-0">
                  <select class="form-select custom-select" name="province">
                    <option value="">--省份--</option>
                  </select>
                  <select class="form-select custom-select" name="city">
                    <option value="">--城市--</option>
                  </select>
                  <select class="form-select custom-select" name="area">
                    <option value="">--地区--</option>
                  </select>
                </div>
              </div>
            </div>
          </form>
        </div>
        <div class="modal-footer">
          <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">取消</button>
          <button type="button" class="btn btn-blue" id="submit">确认</button>
        </div>
      </div>
    </div>
  </div>
  <script src="./bootstrap/bootstrap.min.js"></script>
  <script src="./lib/axios.js"></script>
  <script src="./lib/form-serialize.js"></script>
  <script src="./js/common.js"></script>
  <script src="./js/pemission.js"></script>
  <script>
    // 目标1：渲染学生信息
    async function students() {
      try {
        const res = await axios({
          url: '/students'
        })
        // 渲染总数
        document.querySelector('.total').innerHTML = res.data.length
        document.querySelector('.list').innerHTML = res.data.map(item =>
          `
      <tr>
                      <td>${item.name}</td>
                      <td>${item.age}</td>
                      <td>${item.gender ? '女' : '男'}</td>
                      <td>${item.group}组</td>
                      <td>${item.hope_salary}</td>
                      <td>${item.salary}</td>
                      <td>${item.province + item.area + item.city}</td>
                      <td>
                        <a href="javascript:;" class="text-success mr-3"><i class="bi bi-pen" data-id="${item.id}"></i></a>
                        <a href="javascript:;" class="text-danger"><i class="bi bi-trash" data-id="${item.id}"></i></a>
                      </td>
                    </tr>
      `
        ).join('')
      } catch (err) {

      }
    }
    students()

    // 目标2：删除学生信息
    document.querySelector('.list').addEventListener('click', async e => {
      if (e.target.classList.contains('bi-trash')) {
        const id = e.target.dataset.id
        await axios({ url: `/students/${id}`, method: 'delete' })
        students()
      }
    })

    // 目标3：添加学生信息
    // 3.1 查阅官网，实现 点击 ESC 不关闭模态框。
    const modal = new bootstrap.Modal('#modal', {
      backdrop: 'static',  // 是否显示遮罩层， static 表示静态遮罩层，点击没效果，不会关闭模态框
      keyboard: false    // ESC 点击无效  不会关闭模态框
    })
    const form = document.querySelector('#form')
    const ps = document.querySelector('[name=province]')
    const cs = document.querySelector('[name=city]')
    const as = document.querySelector('[name=area]')
    document.querySelector('#openModal').addEventListener('click', async () => {
      // 清空id
      id = ''
      // 清空地区
      as.innerHTML = '<option value="">--地区--</option>'
      // 弹出模态框
      modal.show()
      // 初始化模态框
      document.querySelector('.modal-title').innerHTML = '添加学员'
      // 清空表单
      form.reset()
      // 3.4 渲染省市区三联动(需要处理选择为空的情况)
      //   - 获取并渲染省份数据
      const res = await axios({ url: 'http://hmajax.itheima.net/api/province' })
      console.log(res)
      ps.innerHTML = '<option value="">--省份--</option>' + res.list.map(item => `<option value="${item}">${item}</option>`)
    })
    //   - 监听省份改变事件, 根据用户选择的内容继续获取并渲染城市数据
    ps.addEventListener('change', async () => {
      const res = await axios({ url: 'http://hmajax.itheima.net/api/city', params: { pname: ps.value } })
      cs.innerHTML = '<option value="">--城市--</option>' + res.list.map(item => `<option value="${item}">${item}</option>`)
    })
    //   - 监听城市改变事件, 根据用户选择的内容继续获取并渲染区县数据
    cs.addEventListener('change', async () => {
      const res = await axios({ url: 'http://hmajax.itheima.net/api/area', params: { pname: ps.value, cname: cs.value } })
      as.innerHTML = '<option value="">--地区--</option>' + res.list.map(item => `<option value="${item}">${item}</option>`)
    })

    // 添加
    document.querySelector('#submit').addEventListener('click', async () => {
      const data = serialize(form, { hash: true, empty: true })
      data.age = +data.age
      data.gender = +data.gender
      data.group = +data.group
      data.hope_salary = +data.hope_salary
      data.salary = +data.salary
      if(id) {
        await axios({ url: `/students/${id}`, method: 'put', data })
      }else{
        // 添加
        await axios({ url: '/students', method: 'post', data })
      }
      // 关闭弹框
      modal.hide()
      // 渲染页面
      students()
    })


    // 目标4：修改学员信息
    // - 3.1 给即将要被点击的 i 标签添加自定义属性 data-id
    // - 3.2 使用事件委托绑定事件
    // - 3.3 点击编辑按钮时获取到当前点击标签的 id
    // - 3.4 显示并初始化模态框
    //   - 标题设置为编辑学员
    //   - 清空表单
    // 设置一个全局 ID  作为区分模态框的确认按钮是  添加还是修改
    let id
    document.querySelector('.list').addEventListener('click', async e => {
      if (e.target.classList.contains('bi-pen')) {
        id = e.target.dataset.id
        // 清空地区
        as.innerHTML = '<option value="">--地区--</option>'

        // 弹出模态框
        modal.show()

        // 初始化模态框
        document.querySelector('.modal-title').innerHTML = '编辑学员'
        // 清空表单
        form.reset()

        // 3.5 发请求获取当前学生信息
        const res = await axios({ url: `/students/${id}` })
        console.log(res)

        // 获取省份信息并渲染
        const pRes = await axios({ url: 'http://hmajax.itheima.net/api/province' })
        ps.innerHTML = '<option value="">--省份--</option>' + pRes.list.map(item => `<option value="${item}">${item}</option>`)
        // 获取城市信息并渲染
        const cRes = await axios({ url: 'http://hmajax.itheima.net/api/city', params: { pname: res.data.province } })
        cs.innerHTML = '<option value="">--城市--</option>' + cRes.list.map(item => `<option value="${item}">${item}</option>`)
        // 获取区域信息并渲染
        const aRes = await axios({ url: 'http://hmajax.itheima.net/api/area', params: { pname: res.data.province, cname: res.data.city } })
        as.innerHTML = '<option value="">--地区--</option>' + aRes.list.map(item => `<option value="${item}">${item}</option>`)
        // 上面三个请求发完，页面上只是显示:
        // --省份----城市----地区--

        // 3.6 数据回显
        Object.keys(res.data).forEach(k => {
          // 单独判断 男女
          if (k === 'gender') {
            const genders = document.querySelectorAll('[name=gender]')
            const index = res.data[k]
            genders[index].checked = true
          }
          // 表单其他内容回显
          const el = document.querySelector(`[name=${k}]`)
          if (el) {
            // select 标签 value 值的作用:
            // 获取 ps.value 等于获取当前用户选择的 option 对应的 value
            // 设置 ps.value 等于用户选择指定的 option
            el.value = res.data[k]
          }
        })
      }
    })
  </script>
</body>

</html>